{
  "manageEntity": {
    "action": "Save",
    "entityId": "2097222153",
    "entityType": "Track",
    "nonce": "0x53b8a9875f10742ba601668d65c404bd14b2381e67a8658059b2b83d8b7aeae1",
    "signature": "0xe1e1e2b7bba3b1b46daf0f6302c937489b197a3df0d0dfba66900f810734b1fc24aebb8c2bd4f948b927809aff6af3febe9d498e4002be95e37d469c7006714f1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}